Fixture for pool or spa



FIG. 1 is a front elevation of a fixture for pool or spa showing our new design;

FIG. 2 is left side plan view thereof; and,

FIG. 3 is a front perspective view thereof.

The broken line showing of FIGS. 1–3 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a fixture for a pool or spa, as shown and described. 